Axial sealing system of a rotary piston engine

Abstract

An axial sealing system of a rotary piston engine with a triangular piston and a dual-arc casing runway surfacing with which a seal body arranged in axial groove or groove bore cooperating sealingly after each axial sealing strip at a preceding end thereof for sealing therewith and the preceding sealing plug under gas pressure from the working or operating chamber. The sealing body is a second sealing plug cut into by the sealing strip and the first sealing plug. Also this can be a sealing strip segment having a configuration that fits with respect to the cutout of the sealing strip and the first sealing plug.

What we claim is: 
     
       1. An axial sealing system of a rotary piston engine with dual-arc casing runway surfacing and a triangular piston rotating upon an eccentric of an eccentric shaft, said piston having radial sealing strips that run along the casing runway surfacing and that are located in grooves of corners of the triangular piston as well as having axial sealing strips in arcuate shaped grooves in side surfaces of the piston, said axial sealing strips cooperating sealingly with the radial sealing strips via sealing plugs arranged in axial bores in the piston corners, the improvement therewith comprising: a sealing body with sealing surfaces engaging in added sealing relationship complementary as to said sealing plug and positioned angularly radially inwardly of the respective piston corner at a location axially adjacent and parallel to the respective sealing plug as well as engaging against an axial sealing strip said sealing body being located radially of said axial sealing strip and being located laterally and angularly to one side in an axial groove means as to said sealing plug, said sealing body preceding said sealing plug in the rotational direction of the piston and following said axial sealing strip in said rotational direction.   
     
     
       2. An axial sealing system according to claim 1, wherein said sealing body is a second sealing plug arranged in an axial groove means with tight fit, said second sealing plug being cut into by the first sealing plug and the axial sealing strip in sealing surfaces thereof. 
     
     
       3. An axial sealing system according to claim 2, wherein a first bore for said first sealing plug is provided after milling-in of a groove for an axial sealing strip and a second bore for said second sealing plug is provided for installation of said second sealing plug. 
     
     
       4. An axial sealing system according to claim 1, wherein said sealing body is a segment of a sealing strip arranged with tight fit in a groove provided directly adjacent the groove of said axial sealing strip. 
     
     
       5. An axial sealing system according to claim 4, wherein a bore for said sealing plug is provided after milling-in of a groove for an axial sealing strip and a groove for said sealing strip segment is provided for installation of said sealing strip segment.